<template>
  <div class="app-container">
    <el-input
      v-model="filename"
      placeholder="Please enter the file name (default file)"
      style="width:300px;"
      prefix-icon="el-icon-document"
    />
    <el-button
      :loading="downloadLoading"
      style="margin-bottom:20px;"
      type="primary"
      icon="el-icon-document"
      @click="handleDownload"
    >
      Export Zip
    </el-button>
    <el-table
      v-loading="listLoading"
      :data="list"
      element-loading-text="Loading..."
      border
      fit
      highlight-current-row
    >
      <el-table-column
        align="center"
        label="ID"
        width="95"
      >
        <template slot-scope="scope">
          {{ scope.$index }}
        </template>
      </el-table-column>
      <el-table-column label="Title">
        <template slot-scope="scope">
          {{ scope.row.title }}
        </template>
      </el-table-column>
      <el-table-column
        label="Author"
        align="center"
        width="180"
      >
        <template slot-scope="scope">
          <el-tag>{{ scope.row.author }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column
        label="Readings"
        align="center"
        width="115"
      >
        <template slot-scope="scope">
          {{ scope.row.pageviews }}
        </template>
      </el-table-column>
      <el-table-column
        label="Date"
        align="center"
        width="220"
      >
        <template slot-scope="scope">
          <i class="el-icon-time" />
          <span>{{ scope.row.timestamp }}</span>
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>

<script lang="ts">
import { Component, Vue } from 'vue-property-decorator'
import { getArticles } from '@/api/articles'
import { IArticleData } from '@/api/types'
import { formatJson } from '@/utils'
import { exportTxt2Zip } from '@/utils/zip'

@Component({
  name: 'ExportZip'
})
export default class extends Vue {
  private list: IArticleData[] = []
  private listLoading = true
  private downloadLoading = false
  private filename = ''

  created() {
    this.fetchData()
  }

  private async fetchData() {
    this.listLoading = true
    const { data } = await getArticles({ /* Your params here */ })
    this.list = data.items
    // Just to simulate the time of the request
    setTimeout(() => {
      this.listLoading = false
    }, 0.5 * 1000)
  }

  private handleDownload() {
    this.downloadLoading = true
    const tHeader = ['Id', 'Title', 'Author', 'Readings', 'Date']
    const filterVal = ['id', 'title', 'author', 'pageviews', 'timestamp']
    const list = this.list
    const data = formatJson(filterVal, list)
    if (this.filename !== '') {
      exportTxt2Zip(tHeader, data, this.filename, this.filename)
    } else {
      exportTxt2Zip(tHeader, data)
    }
    this.downloadLoading = false
  }
}
</script>
